75 points

with explanations pls

what is the smallest degree of rotation that will map a regular 16-agon (a 16 sided figure) onto itself?

a. 157.5
b. 2520
c. 18
d. 22.5

2.
what is the equation of the line through (6, 3) and perpendicular to y=−3/4x+2
?

a. y=−3/4x+152
b. y=4/3x−5
c. y=−3/4x−5
d. y=4/3x+2

3.

select all the true statements for the given similarity statement.
abcd∼ghij

a. bc ~ hi
b. ∠j≅∠b
c. ab∼ij
d. ∠a≅∠g